我用下一个命令:

sudo killall mysqld

/etc/init.d/mysql stop
service mysql stop
killall -KILL mysql mysqld_safe mysqld

When you see the following information, you success

mysql: no process found
mysqld_safe: no process found
mysqld: no process found

我用这个链接解决了在Ubuntu 15.10中安装MySQL 5.6的问题。

在这个安装过程中，我遇到了这样的问题:

"mysqld_safe A mysqld process already exists"

只要完全停止mysqld, mysqld_safe, mysql就解决问题了。

试着连杀mysqld四次。这是唯一对我有效的方法……

root@ubuntu:/etc/init# killall -KILL mysqld 
root@ubuntu:/etc/init# killall -KILL mysqld 
root@ubuntu:/etc/init# killall -KILL mysqld 
root@ubuntu:/etc/init# killall -KILL mysqld 
mysqld: no process found

只要不停地杀死它，直到你看到“mysqld: no process found”。

Try:

/usr/local/mysql/bin/mysqladmin -u root -p shutdown 

Or:

sudo mysqld stop

Or:

sudo /usr/local/mysql/bin/mysqld stop

Or:

sudo mysql.server stop

如果你在OSX中安装了Launchctl，你可以尝试:

MacPorts

sudo launchctl unload -w /Library/LaunchDaemons/org.macports.mysql.plist
sudo launchctl load -w /Library/LaunchDaemons/org.macports.mysql.plist

注意:重启后会持续。

家酿

launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist

二进制安装程序

sudo /Library/StartupItems/MySQLCOM/MySQLCOM stop
sudo /Library/StartupItems/MySQLCOM/MySQLCOM start
sudo /Library/StartupItems/MySQLCOM/MySQLCOM restart

我在https://stackoverflow.com/a/102094/58768找到的

mysql 5.7从二进制文件下载到MacOS:

sudo launchctl load -F /Library/LaunchDaemons/com.oracle.oss.mysql.mysqld.plist
sudo launchctl unload -F /Library/LaunchDaemons/com.oracle.oss.mysql.mysqld.plist

对我来说，在CentOS 6.4上工作的是以根用户运行mysqld stop服务。

我在nixCraft上找到了答案。